let arr = [
    {
        "label": "委员小组履职活动",
        "value": "wyxzlzhd"
    },
    {
        "label": "“沂企商”议事厅活动",
        "value": "jqsysthd"
    },
    {
        "label": "“界别同心汇”活动",
        "value": "jbtxhhd"
    },
    {
        "label": "民主监督活动",
        "value": "mzjdhd"
    },
    {
        "label": "专委会组织的活动",
        "value": "zwhzzhd"
    },
    {
        "label": "联系界别群众",
        "value": "jblxqz"
    },
    {
        "label": "政协交办的其他任务",
        "value": "zxjbrw"
    },
    {
        "label": "对有关部门（单位）开展民主评议、检查",
        "value": "pingyijiancha"
    },
    {
        "label": "受市政协委派应邀参加党委、政府及其部门和监察委员会、法院、检察院召开的有关会议",
        "value": "jianchaweihuiyi"
    },
    {
        "label": "视察考察调研",
        "value": "sckcdy"
    },
    {
        "label": "团结联谊",
        "value": "tuanjielianyi"
    },
    {
        "label": "政协理论研究",
        "value": "zhengxielilunyanjiu"
    },
    {
        "label": "文史资料工作",
        "value": "wenshiziliaogongzuo"
    },
    {
        "label": "对外交往活动",
        "value": "duiwaijiaowanghuodong"
    },
    {
        "label": "新闻宣传活动",
        "value": "xinwenxuanchuanhuodong"
    },
    {
        "label": "社会公益并被组织认可的活动",
        "value": "shehuigongyihuodong"
    },
    {
        "label": "市政协委派的其他任务",
        "value": "shizhengxieweipairenwu"
    },
    {
        "label": "党支部党建活动",
        "value": "dangzhibudanjianhuodong"
    }
]


var set1 = arr.map(item => item.label);
// console.log(set1)


let str = "视察考察调研\n" +
    "民主监督活动\n" +
    "联系界别群众\n" +
    "委员小组履职活动\n" +
    "“界别同心汇”活动\n" +
    "“沂企商”议事厅活动\n" +
    "对外交往活动\n" +
    "团结联谊\n" +
    "县政协委派参加的其他活动\n" +
    "社会公益并被组织认可的活动\n" +
    "政协交办的其他任务\n" +
    "受市政协委派应邀参加党委、政府及其部门和监察委员会、法院、检察院召开的有关会议\n" +
    "专委会组织的活动\n" +
    "新闻宣传活动\n" +
    "政协理论研究\n" +
    "文史资料工作\n" +
    "党支部党建活动";

var set2 = str.split("\n");

console.log(set1.filter(key => !set2.includes(key)));
console.log(set2.filter(key => !set1.includes(key)));
